Instrumentation Interview Questions
Questions Answers Views Company eMail

whats the working principle of level transmeter?

6 45339

Can Any body tell me how to check Modbus Settings in ER300N L&T trivector meter?

2007

what is meant by control valve sizing?

3 7719

Basically iam Instruemntation Engineer, but Iam interested in Instruments design engineering, so plz guide, is there any course, training or Softwres to become Instrument design engineer??.

Honeywell, Tata Steel Limited,

1554

how can you change unit of totalizer in siemens mag 5000 flow meter?

PowerTech,

2 8718

What is the SCAN time of a DCS/PLC? What is the typical value for scan time of DCS and PLC?

Essar, Gasco, Siemens,

6 49152

How to carry out hot loop checking of closed loop pf temperature control valve & temperature transmitter?

2 8885

what is Mv with respect to temprature in thermocouple

2 4635

what is difference b/w the solinoid volve and autodrain?

3 5575

can any one help me to get bel probational engineers sample question papers. I have applied for it.

1549

what is hart communicater? can u give brief explanation about this issue?

3 7247

How to isolate a DPT from line in the condition that process must not be disturbed,and process is also critical and no bypass is available.?

Descon,

4 9412

how to calibrate steam control valve in steam turbine

2794

how to calculate flow range in DP tx

Karnataka Power,

1 5723

if i change range of flow transmitter in th field then does it need to change range in dcs?

3 7190


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Un-Answered Questions { Instrumentation }

What is the use of gauge?

660


why we use cascade control and feed foreword control in 3 element control of boiler drum ?what is feed forward and cascade control system ?

1732


TEMPERATURE VARIATION FOR FREQUENTLY.

1493


Manipulation of dead wt. tester double piston type.

1485


(1) In turbine, what does term CDP, NI, NH, HSSOC, means. (2) What is the purpose of LO overhead tank in turbines.(3) An equipment is certified for EEX, IA, IIC,T6, what do you under stand by this.(4) what is SURGE, and how it is prevented, what is the purpose of bypass valve across AS valve.(5) Give 2 application of quartz crystal used for process parameter measurement.(6) what is meant by cold float of compressor shaft. (7) state four different types of flow measurement. For gas flow measurement mmscfd is the common unit. Expand the unit and specify significance of word S in the unit.(8) what is meant by Gap voltage, in vibration measurement. Normally how much Gap voltage is set and state the reason.(9) what will the new flow factor if D/P transmitter is Re-Ranged from 25” wc to 50” wc.(10) what is the usage of QDV & Volume booster.

3417






which type inter lock use in petrochemical refinery,and oil & gas?

2604


, Instrument Index, P&ID review, I/O schedule, datasheet, DCS / Analyzers specifications, loop diagrams, hook-up drawings.

7506


how to connect transmitter measuring sulfur process? 1-by using long impulse line or 2- by using coated short impulse line

1553


I was working on calibrating turbidity transmitters endress+hauser at effluent polishing plant.We calibrated using NTU buffers.What happened is that when we immersed the sensor, everytime we raise and lower the sensor gradually, the reading will vary.my question is that is there any specifications on what is the required distance from the bottom of the container with buffer to the face of the sensor?Is it ok to install the sensor in a medium which has turbulence specially if bubbles are present?

1714


what is a good line as ic engineer as maintenance ,oc, project, calibration ,validation engineer?

1463


Why humidity limit is 30 to 55 % for raw material storage?

3569


What is feed factor and its Importance in cement industry? How we can solve feed factor?.

3066


If a warning lamp will operate with the ground circuit is bypassed with a jumper wire to ground, what should you check?

1598


How to calibrate Toxic gas detector?

1215


Why 4-20 amps is being used in instruments? Why cant we use any other range instead of 4-20 amps? Why only 4 amps is taken as lower limit and why 20 amps is taken as the higher limit?

1036